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Call of Duty: Modern Warfare II (2022) & Warzone 2

Fix Unsupported Operating System Error in COD Modern Warfare II & Warzone 2

Some Call of Duty: Modern Warfare 2 and Call of Duty Warzone 2.0 players get the Unsupported Operating System error when they are trying to launch the game on PC. The error message says: "Your operating system Windows 7/8/10/11 is not supported by Call of Duty®: Modern Warfare® II. We recommend upgrading to Windows 10 version 1909 or newer."

Fix Unsupported Operating System Error in COD Modern Warfare II

#1) If you are a Windows 10 or Windows 11 user, but the error message says you are using Windows 8 or Windows 7, you should ensure COD MW2 is not running in Windows 7/8 compatibility mode. Follow these steps:

  • Go to the Call of Duty: Modern Warfare II's installation folder.
    Steam: Library > Right-click Call of Duty: Modern Warfare II > Manage > Browse local files
    Battle.net: Games > select Call of Duty: Modern Warfare II > Options > Show in Explorer
  • Right-click on the cod.exe application.
  • Select Properties
  • Then access the Compatibility tab.
  • To turn off compatibility mode, uncheck the "Run this program in compatibility mode for" box.
turn off compatibility mode
  • Now hit the OK button.

If the issue persists, you should disable compatibility mode for Steam/Battle.net too. Don't forget to exit Steam and Battle.net first.

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Steam default path: C:\Program Files (x86)\Steam\steam.exe

Battle.net default path: C:\Program Files (x86)\Battle.net\Battle.net Launcher.exe

#2) If you are a Windows 10/11 user and encounter the Unsupported Operating System error, you should upgrade your OS to the latest version available. To update Windows 10:

  • Open the Start menu.
  • Click the cogwheel to open the Settings menu.
  • Go to Update & Security > Windows Update
  • Hit the Check for updates button.

To update Windows 11:

  • Navigate to Settings > Windows Update
  • Click on the Check for updates button.

I hope this guide helps you. Please share your experience by leaving a comment below.

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